Radioreceiver



Sept; 22, 1925i F". .i RADIORECS VER Filed March 14, 1925 2 Sheets-Sheetl i@ ya# INVENTOR WITNESSES.'

Ziff A TTORNEY Patented Sept. 22, 1925.

UNITED STATES PATRICK J'. BUDDY, OF CENTRALIA, PENNSYLVANIA.

RADIORECEIVER.

Application filed March 14, 1925.

To all whom z'' may concern:

Be it known that I, PATRICK J. BUDDY, a citizen of the United States,residing at Centralia, in the county of Columbia and State ofFennsylvania, have invented certain new and useful Improvements inItadioreceivers, of which the following is a specication.

The objects of my invention are to provide a radio receiver whichrequires neither tubes, ground nor aerial and which will functioneliciently when made in a size which may be carried in a pocket.

These objects, and other advantageous ends which will be describedhereinafter, I attain in the following manner, reference being had tothe accompanying drawings in which- .n

Figure 1 is a diagrammatic view illustratingin a general way anembodiment of my invention,

Figure 2 a perspective view of a receiver of flash-light form embodyingmy invention,

Figure 3 a section on line 3-3 of Figure 2,

Figure l a section on line 1 -4: of Figure 3, and l Figure 5 a sectionon line 5-5 of Fign ure 3.

The numeral 1 indicates an insulating tube upon which the coil 2 iswound, 3 the bar, I a slide mounted on the bar and carrying a brush 5contacting with the coil, and 6 and 7 terminals. The core consists of aninsulating tube 8 mounted Within tube 1 and providing a series ofcompartments 9 separated by silver plates 10. Each compartment ispractically filled with metallic balls 11 preferably of uniform size,part of the balls in each compartment being of steel,

part of soft iron, and part of lead. I preferf to use balls in theproportion of one of. steel,

two of soft iron and three of lead. Insulating tube 8 is connected atits inner end with a metallic cap 12 and at its outer end with ametallic cap 13. Cap 13 is pressed inwardly by a spring 14 which is heldunder tension by a cap 15 screw threaded on tube 1. The

pressure exerted by the spring may be Serial No. 15,491.

wire 16 is first wound in one direction as shown by the series of smallloops to about midway of the length of thecoil, then led back, asindicated by the straight line, then wound in reverse direction, asindicated by the larger series of loops, and this reverse winding iscontinued to the left end of the coil. This provides for greaterresistance within a small space than is obtained by the usual method ofwinding.

17 and 18 indicate the batteries, 19 the usual phone cap, 2O thediaphragm, 21 a cup of insulating material secured to tube 1, and uponwhich the cap is screw threaded, 22 the electro-magnet, 23 and 211screws taking through the cup and into plugs '249 which take intoyielding cups 25 and 26 of conducting material. Cup 26 is connected withterminal 6 by an extension 27 and cup 25 is connected with the batteriesby an extension 28 and a threaded pin 29, 30 is a coiled springembracing pin 29 and held between nuts 31 and 32.

I iind that a magnetic core made of a plurality of magnetizable metallicbodies, .free to vibrate relatively to each other, produces effectsquite distinct from those produced by an integral metallic core. If,however, the

- core is composed entirely of magnetizable bodies in contact with eachotherthe electrical current causes them to cohere too closely and theydo not vibrate with the same degree of freedom. By intermingling leadballs with the magnetizable balls the latter vibrate more freely and thecore becomes more sensitive to the incoming waves. TWhile I prefer usingthe lead balls in about the proportion above stated, that proportionlmay be considerably lessened without materially affecting the result.

By a series of experiments with use of different metals for thepartitions forming the compartments of the core yI am convinced that Iget better results by use of silver but am unable to assign any theorywhich would satisfactorily account for such a result.

Instead of housing the core and batteries in a single tube, the coremight be housed in one tube and the batteries in another, the tubesbeing disposed side by side as in an opera glass.

If the metallic balls are held too closely together or too loosely, theydo not function properly, and I therefore provide the adjustable cap 15by which the pressure may be regulated.

I find that a radio receiver of small size, constructed as abovedescribed, reproduces the sound waves clearly, distinctly andell/ectively.

While I have described my invention as taking a particular form, it willbe'undei1d 20 series of groups oi metallic balls, the groups beingseparated bypartitions of conducting material and each group consistingoi a plurality of steel, soft iron and lead balls; a y.pair ofbatteries;abar extending longizitudinally of thetube; a slide mounted on the bar;a brush carried by the slide and adaptedto contact with the coil; anearphone connected vwith =the tube, and electrical connections betweenthe coil, the bar, 'the 30 core, the batteries, and the ear-phone.

2. "A radio instrument including an insu- Alating tube; a coil woundthereon, the coil being'wound-iin reverse directionsior a part of.the'length and in but one -direction for 'the remainder of its length;a metallic core, lwithin the tube, consisting of a series et igroups ofmetallic balls, the groups being separated by partitions oi conductingmate- 'rial and each group consisting of a plurality 40 of steel, softiron. and'lea'd balls; av pairof batteries; a barextendinglongitudinally of tiel tube;v a slide mounted on the bar; a'brush carried by the slide and adapted to contact with the coil; anear-phone connectedwith thetube, and electrical connections "between thecoil, the bar, the core, the bat 'teries, and. the ear-phone.

"3. A radio instrument including an insu- -.lating.tube; a coil woundthereon; a metallic core, -Within the tube, consisting oi' a series ofgroups of metallic balls, the groups .being separated .by Y silverpartitions and each group consisting of a plurality of steel, soft ironand lead balls;`a pair ot' batteries; .a bar extending longitudinally ofthe tube; asli'de mounted on the bar; a brush lcarried lby the slide andadapted to contact with the coil; an ear-phone connected with the tube,

and electricalv connections between the coil, the bar, the core, thebatteries, andthe earphone.

4. ,irradio instrumentincluding an insulating tube; a coil woundthereon; a nietah lic4 core, within the tube, consisting ol' a se ies ofgroups of metallic balls disposed in a second insulating tube, thegroups being separated bypartitions ol" conducting material and eachgroup consisting ot a plurality ott steel, soit iron and'lead balls; apair oit batteries; a" bar extei1ding"longi tudinally of the tube; aslide mounted on 'the bar; a brush carried by the slide and adapted'tocontact with the coil; an earphone connected with the tube, andelect-ri- Lal connect-ions between the coil, the bar, 'the core', thebatteries, and" the ear-phone.

5. A radio instrument including an insulating'tube; a coilwound.thereon;-a metallic core, within the tube, consisting Vof a seriesof groups of metallic balls, the 'groups being separated bypartitionsfot conducting material and eachgroup consisting'of'aplurality olL steel, sott iron and lead balls; means :tor regulatingAthe pressure of the balls; a pair of batteries; a bar extendingAlongitudinally di the tube; a slide mounted -on the bar ;a brush`carried bythe slide and adapted to contact ,with the coil; lan earphoneconnected with the tube,'and electrical connections between thecoil,the` bar, the core,` the batteries, andthe earsphone.

6. A radio instrument.including an insulating tube; a coil wound'thereon; a metallie core, wit-hin the tube, consisting of a (series etgroups of metallicballs `disposed in a second tube slidable in themaintube, the groups being separated by movable partitions of conductingmaterial, each group consisting oit 1a plurality el steelsoft liron andlead balls; metallic caps closing the ends ot' the second tube, one ofthecaps being slidable relatively tothe tube;-an 4ad justable cap on'the'end 0f the `maintube; a spring i mounted `between the, adjustable capand theslidable cap ;':a pair of batteries; a bar extendinglongitudinally of the tube; a slide mounted on'the bar;`a.brush carriedy the slide and adaptedto Contact with the coil; an ear-phone connectedwith the tube, and electrical connections betweenl the coil, the bar,the core, the batteries, and the earphone.

In testimony whereof I have signed-my name t0 this specification.

PATRICK J BUDDY.

